The attacks Attack caused Causation 67 people to be hospitalised for blistering of the skin and respiratory ailments .

On 2 June 1983 , the McDonnell Douglas DC-9-32 operating Being_in_operation the service developed Coming_to_be an in-flight fire behind the lavatory that spread Dispersal between the outer skin and the inner decor panels , filling Filling the plane with toxic smoke .

The depressurization was caused Causation by the structural failure of the fuselage skin , which produced Manufacturing a hole approximately long on the upper fuselage .

The NTSB investigation revealed Reveal_secret evidence of pre-existing metal fatigue , and determined Deciding the probable cause Causation of the incident to be related to an error in the manufacturing Manufacturing process for joining Becoming_a_member fuselage crown skin panels .